Assume the following code. How many processes are running when you get to the printf(" How many processes are running now?\n");? int main() { pid_t rc1, rc2, rc3, rc4; rc1 = fork(); rc2 = fork(); rc3 = fork(); rc4 = fork(); printf(" How many processes are running now?\n"); return 0; }

only #2 represents an object at rest on a table.

in #1, there is no normal force due to the table; the object is accelerating downward.

in #3, the vertical forces are not balanced; the object is accelerating downward.

in #4, neither the vertical nor the horizontal forces are balanced. the object is accelerating upwards and to the right.

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